Balloons…all kids (even us adults) like balloons.
They love to bounce them around…don’t fill them to maximum capacity so they pop easily. Nothing worse than a frightened toddler/baby scared crying sucks ass.
Plastic cups. If you want to give a bath, plastic cups (even measuring cups) are a blast for kiddlets in the tub. They can spend a lot of time scooping up water and pouring it on their heads.
Empty lotion bottles filled with water (since it’s summer) can be really funny for children of that age. They press down on the spout and water comes out…joy to be had, giggles are certain.
Anything, anything plastic. I don’t know why in our society but kids love plastic stuff.
Run to GoodWill and find picture books. They love picture books. My best friend’s daughter particularly liked to chew on the darn things. (she will be 2 on the 11th).
Got an old keyboard that doesn’t work? They like the sound of keyboard’s keys. Heck, if you don’t need it for a while I have one that I can ship to you if you pay shipping costs. It’s not working but possibly fun for your niece.
Anything NOISY!!! Yes, NOISE and kids go well together. Put some cereal (like Cheerios) in a Pringles like container…I think a few other potato chip companies have them now…cereal in a container she can shake can bring many giggles.
As mentioned, keys are good too. I am a stickler for cleanliness so at least clean them before you give them to her. Imagine the places you go and not wash your hands while handling keys, ick.
Just look around you…if you were tiny imagine what you might be involved in. Even a blanket can be a fun way to entertain. whoosh it over your head then hers…my best friend’s daughter absolutely loves that with her “banky”. It gets old for us adults but man do little kids love it.
Peek-a-boo is always a fun game, yep with the blanket.
Good luck on the kidlett sitting and tell us what worked for your adventures. But know that hands on the most preferred and trying to learn that when he/she is tired they need to nap. (which is your internet time.) They can be cranky form sickness but most likely cranky from being tired and needing a rest.
Create an environment of love and caring and you can soon be the best aunt/uncle. Remember to ask about changing times, when a bottle is warranted and when lunch is.
Never be fearful as your friend/niece will let you know when things need to be different. The most rudimentary (sp) things are the most interesting to them but if your sis has a favorite blanket and toy, those are most certainly very important for her.