Features:
- HYDRO CALCULATORThe Hydro Calculator - Science and technology meet form and function Simply add
- water into the fuel cells and you have a functioning 8-digit environmentally friendly calculator
- Instructions included.Ages 3+
Details: HYDRO CALCULATOR The Hydro Calculator - Science and technology meet form and function Simply add water into the fuel cells and you have a functioning 8-digit environmentally friendly calculator. Instructions included.Ages 3+
