Boing is the toy store to visit in JP! It is great fun, even if you don't have kids. They have a dizzying selection of toys, games, and fun stuff for all budgets. The staff is incredibly friendly, and always has great suggestions. They know their toys!
The store itself is just amazing. It's packed with toys, and everywhere you turn there is something new. There are a lot of quality toys here...not a lot of junky toys. There really is something for all price levels; you can spend $5 or $500.
It's a fun store to bring your kids, as they are very welcoming and have a lot of demo toys out. They area very patient and kind staff too! I love this store.