Other things that have been good indoor hits with us recently
Skittle set
Kinetic sand
Taking all the cushions off the sofa and jumping on them while I hoover months of cracker crumbs.
Aquadoodle
I've also just purchased this beanbag/ring toss set - they're on Amazon and ebay if you search for "throwing beanbags" or "carnival combo", I got mine for a tenner off ebay but there's slightly more expensive ones with good reviews on Amazon if you don't want to risk it. Bonus that they can be used indoors and out.
Another thing I'm going to try and do this year is keep using our garden through the worst of winter, especially on days where it is so utterly miserable that I just can't face a walk (with all those lovely puddles) but toddler still needs a run around, even a few fifteen minute stints. We practically live in it in spring, summer and autumn so I'm working on ways to make it winter proof- I've put chairs in the shed along with some crayons, paper etc, the idea being that I can sit there, sheltered, with a coffee while weatherproofed toddler roams outside/in and out of shed- rather than going out into the garden and coming back into the house five minutes later because it's rubbish out. Sort of an all weather classroom. Wish I had a summerhouse.
You can make a DIY mud kitchen for very little money or effort - they do this in the forest school I take DD to. Get one of those big plastic storage boxes-a good sturdy one. Fill it with old saucepans, spoons, jugs. When you want to play with it, tip everything out of it and turn the box upside down - and voila, you have an easily stored, transportable, practically free mud kitchen
A magnifying glass, bug viewer, and bug identification book can all be bought for less than a tenner- ours were all a couple of quid each from Amazon/eBay and DD will look for woodlouse for hours.
An acrylic mirror and some window crayons have also been popular with DD - none of our windows are safely accessible to a toddler so ergo the mirror
Orchard Toys do excellent games and puzzles aimed at 12 months plus which can be found second hand/fairly cheaply in charity shops and ebay.
For those of you who find it hard to make dinner with a toddler in tow, I got mine a booster seat for the kitchen chair, and a Kinderkitchen (think that's the name) knife, which is basically a safety knife for kids. I give her something to chop- bit of onion, celery - and it keeps her occupied for quite a while.
I have also toyed with the idea of asking on Facebook if anyone local would like a socially distanced puddle jump, but I'm a bit worried I'll be scolded by the online curtain twitchers- i don't even know what the rules are for meeting outside anymore, they seem to change constantly. If anyone has managed this then I'd love to know how you get on.
I think part of the problem is I can't seem to tire DD out enough. Even if we go on multiple walks a day, or stay in and do activities, it's the combination of all these plus the social side she's missing. The few times we've managed to play with other children since March she's been so much more engaged and excited.