leaving kids with babysitter for 2 days

i'm going to texas for 4 days, my sister will have them for 2 days, 2 nights and then DH will have them for 2 days, 2 nights as well.. soooo i feel like i'm forgetting things to send with them to my sister's house, she has 2 kids of her own, similar ages so i know she already has a lot of what she needs, but here's what i have so far

enough clothes and diapers
milk
their sippy cups
their favorite stuffed animals
their favorite blankets
their pillow
toothbrushes

does it sound like i'm missing anything? the reason i'm not sending any toys with them is because neither of them have a favorite toy and she has plenty of toys for them to enjoy

Playpen? Booster seat for meals?

Quoting T♥B:" i'm going to texas for 4 days, my sister will have them for 2 days, 2 nights and then DH will have them ... [snip!] ... i'm not sending any toys with them is because neither of them have a favorite toy and she has plenty of toys for them to enjoy"

other types of foods they like (don't know how old they are).

Quoting ♫ boobook ♫:" Playpen? Booster seat for meals?"

oh i am bringing the pack n play, forgot to add that.. and they both use big people chairs  

Quoting Amanda Contento:" other types of foods they like (don't know how old they are). "

they're 3 and 18 months and both eat everything   but maybe i'll bring some of the stuff i have in the pantry and freezer just so she has enough