Garden toys for 15 month old?

So Isla-Rose is 15 months and walking now she loves the garden I want to get her some garden toys but as an early years teacher I can see the result is going to be my garden turned into an early years outdoor environment! I've got my father in law on the case of making me a pallet mud kitchen. I also want a play house and a sand and water table for her. We have cats so need a sand table with a proper lid. I quite like this one http://www.amazon.co.uk/Little-Tikes-Sand-Sea-Table/dp/B000MG11P0the Little Tikes sea and sand. I would love one like I have in my classroom (it's wooden and metal) but the cost of that is astronomical. I think the little tikes one would be ok. Then I was thinking of a second hand play house. Can anyone recommend me anything else for the garden?

A wigwam or tent is a good alternative to a play house and tidys up nicely!

Sand and water play table looks good
My first reaction was to wait on the play house till she gets bigger and get a bigger one. I found mine play with them when older. that might just be my kids though!
We had/ have one of those tent and tunnel type things that was used more at toddler age for crawling in and out and in etc good for developing those gross motor skills.
I d say things like a outdoor ride on for getting on and off and putting things in and out are good. Also just things like a bucket and spade and a patch of soil always goes down well especially when you don't necessarily want her to be covered fully in mud that day.
A paint brush and a tub of water is always good fun

A rocking see saw thingy is good. Just make sure it has a seat in the middle so you don't have to constantly rock her. What about a drain pipe marble run?

A bike! Mine play with nothing else none of the toys

A paint brush and a tub of water is always good fun

My kids love 'magic painting' with water and one of my big paintbrushes

Chalks to draw on patio slabs are also a winner here!

No advice but picking up loads of great ideas for Juliet in a few months

She has a bike already and space hopper and tent tunnel thing. We do magic painting and bubbles already. Thanks for the ideas.