Interactive aquarium full of bioluminescent plankton called dinoflaggelates ("dinos"). The plankton illuminates the dinosaur-shaped environment when you gently shake it. Just let them bask in indirect light during the day, and they'll treat you to a soft blue light show at night.
I went home with a package of Sea Monkeys at a press event a few years ago and was waiting for the right time to spring it on my daughter. After 21 inches of snow and two days indoors, last weekend turned out to be the exact right time. The hubs [...]