We gave them to Alyce for her 1st birthday and they were very helpful teaching her gross motor skills like picking up and stacking things. Luke is quickly learning the same. What is neat is that at times they work together to build up a tower, that they then knock down, and having a great time in the process.
A few weeks ago while we were out at Sam's Wholesale getting cases of green beans and discount pizza Alyce and Luke showed me siblings don't always have to be at each others throats. While eating pizza and hot dogs Alyce and Luke shared a set of cute sibling hugs. In the pictures we took it looks more like Alyce is strangling Luke but he was definitely giving her some "lovies" too.
Seeing the initial glimpses of what brother and sister life looks like gives me hope that Alyce and Luke will be friends as well as siblings.