To be fair the shoes maybe stop them slipping. I don't see the issue with the Barbie house by the pool either. They're playing and at least it's age appropriate. I guess they moved it outside. My first thought was 'thats probably a $200 dollhouse so I assume Gigi and Mark paid for it'. We know Tracy doesn't spend money like that on her kids.
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My in-laws used to buy loads of toys for my daughter to play with as they minded her a couple of days a week when I was at work. It was nice but I felt a little excessive and a bit of a waste as she could always take things from home. They even got her another bike which tbh I thought was a bit silly as we only lived round the corner and could have taken that in the car if needed. She never used the one they had at their house. My mum was the complete opposite. Used to drag out toys from when me and my sister were kids for her to play with! Lol. She always liked to keep things 'just in case '