My son had quite a few of these sorts of things when he was a kid. Colour matching, stacking up shapes. Older babies and toddlers love them, and younger babies ... well they tend to gum on them but still, they're a good toy. And always nice to get wooden ones. This Melissa & Doug Stack & Sort Board has been reduced on Amazon from £6.99 to £4.90. Delivery is free with Amazon Prime.
This is the sort of learning fun that kids really enjoy, at least in my experience. The concept is simple enough. The goal is to match the colour and quantity of the 15 colourful wooden pieces to the printed key on the sturdy solid-wood board.
The manufacturer's description on the website calls this "a perfect first manipulative that helps teach matching and counting skills". Hmmm I wonder sometimes where they come up with this guff. I think what it means is that it is good for helping little ones develop their fine motor skills, learning to manipulate and handle objects with a specific goal in mind - get the shapes on the pegs in the right shapes and colours. To be honest, I can't imagine any child not actually developing fine motor skills on their own unless they were left in a particularly sterile environment. But the point is that they enjoy doing it, and these toys are a baby's idea of fun.
Thanks to goonertillidie at HUKD!