science
создатель Hunter Reavis
1. lava lamp
2. climate change project
3. experiments
3.1. variables
3.2. Self inflating balloons
3.2.1. ruler
3.2.1.1. inches
3.2.1.1.1. centimeters
4. teams
4.1. team work
4.1.1. people
4.1.2. helping