Baby wanting more play time

My baby just turned 5 months and now likes to stay up longer periods of time and I'm running out of ideas of what to do with him. We used his bouncer, he has a sit up chair, we lay him on the floor, he has a mat that's attached to a piano where he can kick and it makes noises, he has the swing and a lot of toys.

He seems to want more play time and not content with what we have here. What else can I get or do with him?

Contemplating on buying this but unsure if it'll be effective.

Any suggestions??