Building blocks are popular toys for all ages. From LEGO building with the older kids to chunky blocks for the younger kids. Of all the building toys my son has owned, the Playmobil sets are of the best toys for toddlers that I have been around.
One of the things I love about Playmobil is that you can connect with other sets to really expand the imagination. Many of the Playmobil 1.2.3. sets can pair with other sets such as the Zoo (9377-above) and if you combine with the Lion Enclosure (9378), Zookeeper with Giraffe (9380) or Zookeeper with Elephant (9381) you get a large play surface full of animal fun.
How about being Prince or Princess for a day? The Playmobil 1.2.3. Castle with Stackable Towers (9389) has fun, bright colors and comes with 2 figures as shown below, animals and a swinging door and flags.
The round towers can be attached to the castle and stacked on top of one another to build a tower up to three stories high. Can be rotated 90° as desired.
If you are looking for some of the best toys for toddlers, Playmobil has so many sets for boys and girls.