On this blog, I listed a list of things that can do with Lego.
Ingredients: a bucket of LEGO bricks ... and a little bit of imagination

With the first video, let's start with a nice list that Lego made for us

50 EASY Play and Learning Ideas for Kids with LEGO DUPLO bricks! Simple DIY Activities for Home

Top 10 Easy LEGO Building Ideas Anyone Can Make #13

10 Things You Can Make With 10 Lego Pieces

If you also have any unconventional ideas, I'd love to share with us at htbimoc@gmail.com