These are a different way to do weekly STEM challenges, especially at home, when not everyone has the same supplies. For these challenges, students can collect 10 (or another) number of items to do a challenge. These can be things they can find throughout their house, and they can use multiples of items if they choose. The lab sheet is optional, but I give my students a day to pick their items and list them (they do not have to keep them in a bag). There are 20 STEM challenges included in this