The Lego Technic Whack! 135-piece building kit is just $12.99 on Amazon. That's $3 off its regular price and one of its lowest prices ever. It never dropped below $16 until this month.
The companion get to the Whack! is the Bash!, and it's also on sale for $12.99 on Amazon. This is a similar model with a slightly different design and color, but they make a great pair for crashing into each other.
You can also go with the Lego Classic Medium Creative Brick Box set, which is on sale for $20.99 at Best Buy. All the pieces in this set and the others are compatible with each other.
The Whack! set lets you build a fast car with a powerful pull-back motor, a sturdy front bumper, a rear spoiler, and wide black rims with low profile tires. The engine pops out on impact. The set is made for ages 7 to 14. Users give it 4.8 stars based on 269 reviews.
