Where to go for short ski weekend with 4 year old. Flying into Bergamo.

Going skiing for just the weekend (this weekend) with my 4 year old son for his first time skiing. I'm not a particularly good skier and this trip is really about him, not me. We were planning to go to Passo Tonale only because we've been there before. However, wondering if anyone thinks there is somewhere more convenient or better to take him? The plan was basically for him to have a couple of lessons and do some basic skiing. Would be nice also if there would be skating, sledding or other kid-friendly activities around. Also, would need to be somewhere with a chance of still finding a hotel last-minute

Many thanks for your thoughts!