First time my baby step on our grass

I let my baby walk on our grass this afternoon. And he liked it very much. But I need to guard him since there are some poops and seems he wants to pick up some pieces. Gee! Not good! Since it’s his first time in stepping on our grass, he was walking tip toeing, running and he even wants to jump over the back fens. Gee! I do hope that I can bring more often now that it’s still summer.