Which Equity or ETF to invest with small amount?

I have an account with $700 and I’m asking for opinions on which equity or ETF I should buy. I understand this is not financial advice and that everyone’s situation is different; I’m looking to learn, compare ideas, and have little fun with a small amount of money.

Years ago, I was lucky with Pier 1 (bought at $0.50, sold at $25) and Party City (bought at $0.75, sold at $10). More recently, GameStop and a few others did well. I’ve also had losers. One painful example: I bought a stock at $0.10, it rose to $90, but I wasn’t aware of it at the time, forgot to sell, and it eventually crashed.