What To Buy For Kiki?

Kiki’s 2-year-old birthday will coming soon. I have no idea what to buy for her as birthday gift yet. If she stills a baby, I am surely will buy her more baby clothes or baby toys. She is 2 year old now; her sister has passed many clothes to her so I do not think I should buy her more clothes. What about toys? What kind of toy suitable for a two years old toddler? I need something really could get her attention and play for longer time. I have bought her too many toys that she only played for one or two days. I wish I could get her something useful this time. However, what is it?