mad science solar balloon kit
mad science solar balloon kit . the philadelphia group amazing science kits solar balloon . fill this six foot balloon up with air ; let it sit in the sun ; then watch it rise makes a great school science project . this kit contains one 6ft solar balloon ; string ; and an instruction sheet . recommended for ages 8 and up . warning choking hazard small parts . not for children under 3 years . this set contains chemicals that may be harmful if misused . adult supervision required . these cheap wholesale bulk discount craft kits for kids imported .