A blind trust is like a special box that you put your toys in, but you can't see them anymore. Instead, someone else takes care of your toys and plays with them for you. This person is called a trustee.
Grown-ups sometimes set up blind trusts for their money and investments. In a blind trust, the grown-up gives their money to the trustee to take care of it, but the grown-up doesn't know what the trustee is doing with it.
This is because the trustee is keeping the money a secret from the grown-up, so the grown-up won't be tempted to use the money for things they shouldn't, like buying too many toys or candy.
The trustee has to make decisions based on what is best for the grown-up, and they have to follow special rules and laws to make sure everything is fair.
When the grown-up finally gets their money back from the blind trust, they might be pleasantly surprised to see how much their money has grown!