The Aran Valley holds the Family Tourism Seal, and at Baqueira Beret this shows in something very concrete. There isn't a single, generic "kids' playground," but rather several parks spread across different areas of the resort, each designed for a specific age range, from 6 months old up to the point where the child already skis on their own. Here's the full breakdown.
Baqueira Beret spreads its kids' playgrounds across different points of the resort, all staffed by qualified personnel:
There are combined packages of ski lessons plus time at the kids' playground, an option worth asking about directly at the ski school if you're going to book classes for the youngest children.
In addition to the kids' playgrounds, Beret has its own circuit called Funpark, next to the Clot Der Os beginners' chairlift. 1,750 metres of piste decorated with monster figures and reproductions of animals native to the Aran Valley. It's designed for children from age 2 who are already starting out in skiing within a controlled area, without speed being the goal. Here it's about playing while learning to slide, not about going down fast.
At the end of the Beret car park there's a small area with a ramp for your own sledge, as well as a dog-sled activity. A plan that doesn't depend on the child knowing how to ski or being old enough for the slopes—all they need to worry about is having fun!
If you're also looking for structured lessons alongside the playground, many schools in Baqueira offer packages that combine both.