Woot offers MEGA Pokémon Building Toys Set, Holiday Calendar with 202 Pieces, 2 Poseable Characters and Accessories, for Kids for $9.99 (orig. $34.99) + free shipping with Prime.

Product Description:
Celebrate the holidays Pokemon-style by unveiling 24 different festive surprises. Open a new Pokemon-themed build each day. This calendar features 24 mystery windows to count down the holidays. This seasonal building set includes 2 buildable and poseable Pokemon – Pikachu and Piplup – plus festive outfits and more. Happy holidays. Ideal for Wonder Builders, ages 6 and up
 

• 24-day holiday calendar building set with variety of festive Pokemon surprises
• Includes 2 buildable and poseable Pokemon figures, Pikachu and Piplup
• 225 bricks and pieces combine with all Mega Construx building sets and are compatible with other name brands
• Ideal for ages 6 and up, this construction toy provides build-and-play experiences to help develop creativity and problem-solving skills