We’ve been playing with LEGO® DUPLO® bricks since my 6 year old was about 1. So about 5 years.
I love DUPLO products. They are so user friendly and they really open up a child's mind on multiple levels.
I feel that DUPLO bricks take my kids on a journey. Every time my three and a half year old daughter plays with the LEGO® DUPLO® Ariel's Undersea Castle set (Item # 10515) in particular, she creates a whole underwater story with Ariel and other DUPLO characters she has. She loves to mix up the DUPLO characters and invite other characters to different scenes. She really brings them to life!
My child does a lot of role play with the DUPLO bricks. After she creates what is in the instructions, she gathers the DUPLO bricks together and builds structures of her own. She also invites other toys to the DUPLO world she created, and they join the party too!