Is 2 and a bit too young for a star chart?

[Varfalli34]

Am struggling with getting my 2yo to sleep through the night. I am pretty certain nothing is up as I go in, quick sip of water and kiss and then out again and all is fine. I'm thinking the idea of three nights sleeping through and you'll get a prize or similar is a bit too advanced for him (although he does understand rewards) but struggling to think of another way to do it.

I introduced stickers age 2.3 - one sticker for going ti sleep in his own bed and one sticker if he stayed in his own bed all night (sleeping through was too ambitious for us!)

It worked ok but not great. To the point that when I offered to give him his stickers he wasnt interested! But it may just be DS - he doesnt respond to bribery and will refuse biscuits if hes not hungry/in the mood.

However after the first 3 nights he did get a big present (leftover fr

...from xmas) and that had a much more positive effect especially as we went on and on about why he got it an told grandparents etc that he was a good boy who slept in his own bed and got a present...

It did sucessfully stop cosleeping but he still doesnt sleep through

I was planning on the present idea but how do I incentivise it? Will he be able to understand me saying if you sleep in your own bed for three nights you will get a present? Or do I just have to hope that it happens so I can then reward him for it and hope it encourages him to keep it up?

He really wants a Percy train but I feel like it might be a bit confusing to say if you sleep in your own bed for three nights you will get Percy/nameless reward. Surely too young to look that far into the future?

I made 'staying in bed' party after each night my dd stayed in bed.
When she stayed in bed all night she got a balloon in the morning, much enthusiastic praise, a made up song about staying in bed sung to the tune of happy birthday... And the best part (as she is a chocolate fiend!), a small handful of choc chips with her breakfast. It worked!

Oh, and before I put her to bed the night before there was much enthusiastic talking about a party if she stayed in bed.
She was about 2.5

We told DS in advance about the stickers (as they were daily) but not the present as I didnt think he'd get the concept (ie reward for several good nights) but we did go overboard with praise and association when we did give him the present.

We had the sleep fairy - she would visit in the morning and leave present under my DD's pillow. - but only if she slept in her own bed all night. Stickers lost their value after a while.