Imagination sure is alive and well. I have GS4 3 mornings a week at his house from 6.30am to 8.15am (DS has to leave for work before DiL finishes her night-shift).
This morning we have been 'nee-nawing' up and down the hall in our firemans helmets, putting out fires, rescuing Norman, Trevor and a cat from trees (thanks Fireman Sam for the ideas)...doing gymnastics like the chap in Lazy Town...had a 'nic-nic' (picnic) on the lounge floor of tea and hotdogs (playfood)...and curiously, turning the cats play tunnel on it's side, in order to stand in it and be a rocket taking off from a 'dark nunnel'...not sure where that came from and I failed miserably. His 3yr legs fitted nicely, but sadly my size 7 boot got stuck. I was called 'silly Granny' for that one, but he did help me extricate myself once I'd wriggled my foot out of my boot.
We finished off up in his bedroom with cups of water (hot chocolate apparently) having a 'cuppa and chat like Mummy and you Granny', and when Mummy arrived she was handed one too....after we had teased her by hiding under his quilt and pretending we'd run away!
This is quite normal for him, and I love how his mind works, but I'm beginning to realise why I'm so knackered on the days I go straight on to work afterwards
Oh, and he also has a pet dragon called Rex (imaginary) who today was very silly and tried to jump over a chair, hurting his leg, so we briefly donned the doctor and nurse outfits to deal with Rex's boo-boo!