Hey Jen,
What about getting some of the oversized silks that are suitable for using for tent play or dress-up. At his stage this type of item could be a “lovey” type item (especially good for the very tactile child) as well as playing peek-a-boo/ where is baby, etc. You could even do a mini version of a parachute where you and the other children lift and lower over your little one or toss a mini beach ball in the air with it.
You could buy a classical CD for children. This will grow with them. Get one that is especially made for bed time, play time, etc.
There are some of the very heavy cardboard block available that are oversized so children can make houses with them but can be unfolded to lie flat for shipping. These are great BIG building as well as simply stacking a few and knocking them over.
Hoping you find just what you’re looking for,
~jacqleene