Be Careful

I'm trying to be a little bit more specific with my, be careful instruction. So for example, we just bought them bunk beds, which they're very young for bunk beds. But I trust my eldest, my four year old to be on the top bunk. The problem is my two-year-old who is very confident likes to go up and down the steps. And he thought it was fun to start jumping off the steps. It's kind of one of the family joke that my mum says, has said that obviously thousands of times - she always used to say that to us as kids. Although that is one of the phrases that I'm really trying hard, not to say