Physics for Kids has been discontinued. Similar apps include Experimenters Circuits, which is free. Other options are LabsLand, PhET Interactive Simulations, EMANIM Online and Amanogawa.com. In total there are six Circuit Designers like Physics for Kids for the web, Android and iPhone.
Educational virtual 3D laboratory simulator helps students, teachers, and tutors conduct electrical circuit experiments by providing realistic equipment access anywhere, avoiding availability issues and safety hazards, and enhancing learning with immediate feedback and...
LabsLand lets students access real educational laboratories through the Internet. Schools, institutions and homeschoolers can use it to provide real labs and real practical and scientific education without having the physical equipment themselves.
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Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.
EMANIM is a web app displaying interactive animations of electromagnetic waves and presenting phenomena such as polarization, superposition, interference, absorption, refraction, and optical activity (linear and circular dichroism and birefringence).
The myPhysicsLab website shows the simulations running and contains explanations of the math behind them.
