DS is still just 16 months. He's often shy with adults and even with his peers sometimes but he really loved some of the older kids in our street playing with him all day at a party. He seemed particularly fond of a 6yo who's one of 4 and always getting in trouble for whining. She's a lovely kid though, very caring and sweet, quite sparky and chatty too; I feel like she struggles with being the youngest and a bit left behind by the others. Would it be very weird to ask her mum if we can ask if she'd like to come and play with DS one day in the holidays? There's also a 9yo who's fantastic with all the kids, including this little girl, though of course then the age gap is even bigger, but it might be more fun for all to have another older one.
If you have kids of that age, would it seem a bit weird?