Hold car seat adaptors. to fit hold or hold mix 0+ infant car seat onto giggle mix or giggle 2 pram and pushchair. got giggle mix? got giggle 2? attach your co-ordinating hold or hold mix 0+ infant car seat. here's how...just pop these adaptors into your giggle mix or giggle 2 pram and pushchair chassis. click the car seat on top and you’re good to go.