Academy 18174 Rolling Ball Timer - Da Vinci Series No. 12 (Snap Kit)Da Vinci Machines - EducationalNote: Requires assembly. Snap together kit- no glue, paint or batteries required.DESCRIPTIONThe Rolling Ball Timer uses the law of motion, as well as the con
Academy 18174 Rolling Ball Timer – Da Vinci Series No. 12 (Snap Kit)
Da Vinci Machines – Educational
Note: Requires assembly. Snap together kit- no glue, paint or batteries required.
DESCRIPTION
The Rolling Ball Timer uses the law of motion, as well as the concept of gravity and kinetics to measure the passage of time.
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