My daughter always wanted a pet but we live in a flat and could never have one, so this Sea Monkey idea sounded like a good plan. We got it about a month ago, and my daughter was very patient and precise with all the instructions and readings in prep-for the great experiment - we got the spring mineral water and the warm spot, and followed closely all the instructions.
My daughter is now genuinely happy with her new pets, and we're all amazed at the pace of their growing, and minimal care required... Within 1 month-ish the biggest ones are nearly 1cm and there are small ones too, indicating that reproduction may have happened. They are the dream pet, feed them once every 5 days, oxigen the water by blowing with a straw (which most children love to do) and have fun!!! But careful! Follow closely the instructions, as per my daughter's advice on video: Tap water is bad and will kill your pets! You need spring/mineral water!!