Cleaning the STEM art cart

Cleaning out our STEM cart and putting some fresh ideas and inspiration in it for the month of December.
Our cart is from Costco a few years ago, but it is similar to the Ikea Raskog cart or this cart
https://www.homedepot.com/p/Seville-Classics-3-Tier-Rolling-Steel-Storage-Bin-Utility-Kitchen-Cart-with-Wheels-in-White-SHE20305B/314053796

Videos mentioned:

Making a STEM cart
https://youtu.be/PpHdvSFei_8

Shopping day with kids
https://youtu.be/I5pFCAKcax4

Referral links (not sponsored)

Azure Standard
https://www.azurestandard.com/?a_aid=HOSXZEAg44

Referral code for Butcher Box
Butcher Box share link http://fbuy.me/rOzAv

Book outlet referral code http://bookoutlet.com/Loyalty/Referral?raf=78gSvZHW&c=url