I'm probably going to get slammed here, but
please be wary of jumperoos and other such things (jolly jumpers, exer-saucers etc)!!! I know they generally love them, but at the very least be careful they're used on a very limited basis (10-20 mins a day; TOPS) cos babies really aren't built to be dangling by their crotch and tippy-toeing the ground. It's nt good for theirs back and neck to be upright a lot before they're able to hold themselves upright, and it's not good for their legs to be dangling from their crotch a lot.
I know you'll all probably keep using them anyway, but if you insist on using them then just be aware of the dangers, and limit them.