At what age did you start putting your baby in a jumperoo?i

B e A m * • ⚽️ #1 Jul 17 🌷#2 Mar 20 🚗 #3 Feb 24

I just bought one for my baby and put him in it yesterday. He's 4 months old and can hold neck very strongly. However, he did not jump. He was just sitting there looking confused. I didn't see that coming as he loves to kick! What should I do? We did prop him with something underneath as he was too short for it. I'm starting to wonder if I should keep it for when he's 6 months. Is that when babies start using this kind of toys?

Update: I tried to put my baby in it again and by third attempt, he was jumping like crazy. I think it just took him some time to figure out what the thing was for. Now he loves his new toy! He's always smiling and giggling when he's in it :)