Does anyone know how to get food coloring off of your hands? Asking for a friend... Get your very own CrunchLabs Build Box! Get 2 FREE boxes at https://crunchlabs.com/5AtHomeExperiments I started a company called CrunchLabs where we build a toy together and then I teach you all the juicy physics of how it works. So if you want to learn to think like an engineer and have a really fun time doing it, check out the current promotion where you get 2 FREE boxes at https://crunchlabs.com/5AtHomeExperiments Science Bob’s top secret at home elephant toothpaste recipe: A clean 16 ounce (473 ml) plastic soda bottle or a water bottle. 6 Ounces of 20-volume hydrogen peroxide liquid (20-volume is a 6% solution that is stronger than what you find in most pharmacies. It is typically used for lightening hair and is found at many beauty supply stores. You can use the 3% hydrogen peroxide found in pharmacies, but the reaction will be a bit smaller) 1 Tablespoon (15ml – one packet) of dry yeast 3+ Tablespoons (15 ml) of warm water Liquid dishwashing soap Food coloring Science Teacher Version: BIG Elephant Toothpaste Reaction CAUTION: This reaction uses dangerous chemicals thatch cause chemical burns or even blindness. This demonstration should only be done by by trained professionals. In a 5L flask: 250 ml 30% (not 30 volume) hydrogen peroxide 30ml liquid dish soap 30ml food coloring. Add 75ml sodium iodide solution (2M) The foam may have unreacted peroxide which could cause a chemical burn and so it should not be touched. Thanks to these folks for providing some of the music in the video: Ponder - @Pondermusic Laura Shigihara - @supershigi Andrew Applepie - https://soundcloud.com/andrewapplepie Blue Wednesday - https://soundcloud.com/bluewednesday PLATINUM TICKET INSTANT WIN GAME NO PURCHASE NECESSARY. Promotion starts on 06/1/2024 & ends on 05/31/25, subject to monthly entry deadlines. Open to legal residents of the 50 U.S. & D.C., 18+. 1 prize per month: each month is its own separate promotion. For the first 2-3 months, winner may be notified via phone call instead of winning game piece. If a monthly prize is unclaimed/forfeited, it will be awarded via 2nd chance drawing. See Official Rules at crunchlabs.com/sweepstakes for full details on eligibility requirements, how to enter, free method of entry, prize claim procedure, prize description and limitations. Void where prohibited.
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Does anyone know how to get food coloring off of your hands? Asking for a friend... Get your very own CrunchLabs Build Box! Get 2 FREE boxes at /5AtHomeExperiments
I just want to go back in time and watch Mr. Wizard now.
Mark, I love your videos and would like to visit crunchlabs at least once, but there is one small problem... I'm from Russia, and I'll never be able to meet you. I've always wanted to be an engineer at NASA, just like you. You're cool, Mark, thanks for your videos.
Correction, @ 9:08, H20 is two Hydrogen atoms and one Oxygen, they point it out as one hydrogen and two oxygen atoms, which is wrong.
Mark rober has only made my passion for engineering (mainly mechanical engineering) stronger. I'd just like to say thank you.
Science Bob is so wholesome, whoever had him as a science teacher was lucky. Kudos for continuing to bring him back Mark!
Thanks for the recipe for elephant toothpaste. The burning question in my mind is: how do you dispose of it? Is it bio safe? Biodegradable? Or does it need special remediation?
My son and I just built a “Crunch Rober” this morning!
Mark, you are such an inspiration. I've written down quotes I've heard you say to help keep me motivated. Thank you for all you do for youngsters and us "big kids" too.
Fun video! I discovered the nucleation effect myself at age four, by accident, (in 1955), by dropping pretzel salt into ginger ale at my grandparents' house. I've played with this ever since, but I never thought of using popcorn! Very cool! Also, you can do the egg-into-the-bottle trick by putting some boiling water into the bottle, shaking it around to heat the air inside, then quickly dumping the water and sticking the egg on top... it takes awhile, though, for the science to happen, but you don't get ashes all over the egg! It's a variation on Mr. Wizard's "The Invisible Giant" experiment. BTW - Repeating the process makes it possible to put multiple eggs in the bottle! You do great work, Mark.
5:14 Your a wizard Bobby 😂😂
I got a experiment, you make your hand a bowl and then you clap your hand then air will come out then put you mouth like 2 inches apart and then when you clap it makes a noise you can make the noise high or low to open your mouth not too big or leave a little hole in your mouth so if you do this do a video and see you there.
Mark Rober and Science Bob you are both the best
I know for a fact that crunch labs has made my household more fun! Its just my son and me so i appreciate the learning ideas we can do
Bring Electroboom nextime🎉
to get elephant toothpaste, there is a decomposition reaction where the oxygen (O) and hydrogen (H) split from O2H2 to 2 H2O and 1 O2
Y’all should do an elephant toothpaste inside a car!
My 5 and 6 year old boys love you! Thank you for the fun experiments
"Mark Rober, I want you to dub your videos on this channel into many languages, just like your main channel." Because I love your videos thanks ❤
Could you also do a video on how best to clean up the messes created here? :D