You don’t know eyy? Well luckily I’m your saver see? For your 20 follower special you should make a little gathering of your followers. Draw them as bombs!
Oh you don’t like that… hmm let’s see,,, I got it! You could otherwise make a little candle cake game where you need to blow out the candles. Wait maybe you just want a thank you and not a game.. throw bombs and they explode in to rockets?
Some jokes aside you have some prearranged neat games! You don’t have to take my suggestion seriously. Though the cake one sounds like a cool game idea. Just say thank you in your own way, how ever crazy it might be. Keep on posting cool things and you’ll get to 24 followers in no time! (Joking, you’ll go really, far I can tell goodluck in everything)