Deals Direct have a fab little versatile pool on sale for $19.95. The Bestway Play Pool with Twist 'N Fold Tent offers great play opportunities for pretty much all seasons.
While it's a pool, and will be great fun come spring time, there's a lot of year round fun to be had with this play pool. In summer its canopy gives your little one protection from the sun, which is useful. In the colder weather, however, it can serve as both an indoor or outdoor ball pit. I know both my girls loved ball pits at various stages of their babyhood and even now as toddlers love emptying the balls out over the floor from time to time.
When not in use it can be deflated too, so you don't have to worry about yet another toy cluttering up the living space.
I think that's pretty good value for money, actually. I had a look around and while it's not the cheapest play pool you'll find, it's one of the best priced ones with a canopy, and remembering to be extra sunwise for the little ones with delicate skin, I think it's a winner!