Can you recommend any (maybe electronic) cat toys that would work while I'm gone?

So, I have to go to a concert down in South Carolina for the weekend, and my brother and Mum are going snowboarding, so no one will be around to give the cats company. I don’t want them to be bored out of their minds, so… can anyone recommend any cat toys that would plug in and twitch, spring, or whatever while I’m away?