Small World Toys Science - Water Fountain Kit How do water fountains work? Find out with the Circuit Science Water Fountain kit from Small World Science See how the fountain defies gravity and sprays water at different angles All the parts to build a working water fountain are included - you'll need to buy 2-AA batteries Finished water fountain: 5.5''W x 5.5''D x 8.5''H; for children aged 8 and up For 50 years, Small World Toys has delivered fun, safe, innovative and endearing products for children of all ages