Schwinn Squirt Sidewalk Bike for Kids 18-inch Wheels Blue and Green Make a splash this summer with the Squirt sidewalk bike by Schwinn! This brightly colored bike features an electric water cannon that’s sure to delight -- and surprise! The Squirt features SmartStart technology: a major feat of kid-size engineering designed to outsmart physics so kids in motion stay in motion. The single speed drivetrain is simple for young riders to use and easy to maintain. The rear coaster brake provides intuitive stopping power while the caliper hand brake prepares kids for a hand-brake-only bike. Plus the quick-adjust seat makes it easy to find a comfortable stable fit.