This one is probably my favorite. It lights up via a small LED. Of course it does, it's a photon, the particle that IS light! The switch and battery are in a little zippered pocket at the back, so you can turn it on or off as you like, and the button battery can be replaced.
This is the last particle plush I have finished, though the proton, neutron, and meson will be coming eventually. Keep your eyes peeled, those should be very fun!
