Toddler stroller help

[lisa270988]

My 3 year old still loves napping in his stroller but his head almost over the top of it! It's a slivercross pop and I also have a zummie eden I keep my car.
Will he still be able to nap in it once his head is over the seat?
A couple of people said the yoyo stroller is roomy and good for the toddlers and it doesn't matter if there head is over the top they can still nap.
Will this be the same for all strollers
Help

At 3 do you really think he'll be napping much longer? Probably not worth buying a new one. I'd put off buying a new one until he really can't fit properly any more and seeing if he still naps then.