How to keep your toddler entertained while in 3rd trimester…

I am 37 weeks and just started my MAT leave. I am soo tired, sore, exhausted, barely can walk. And now I’m home with my 3 (almost 4 yr old) 24/7, I want to do fun things with him to keep him entertained & happy. But I am physically unable to do so much. Even a trip to the store is a hassle, he is SUCH an energetic little boy. Even giving him a hug he’s trying to climb on me no matter how much I explain he cannot lol! Inside all day he is too rowdy. Home activities only keep him happy for so long. What kinds of things do you do with your toddler while pregnant? I feel so guilty being so lazy. But also want toddler/pregnancy friendly things and I’m at a blank