1. Chalk on paving.
Toddlers love to be let loose with something they can mark with. So to get it out of their system give them some chalk and let them loose outside. It will just wear off the paving or hose off easily. Apart form a free scribble you can both make stepping stones that they can walk/run on. You could make up a story about having to cross a river to find a secret treasure and the only way over is across the stepping stones you have marked on the paving.

2. Bubble pop. Outside activity.
Simply blow bubbles (either with a home made kit or brought one) and say "Lets catch one before they disappear". "This time let's catch two...three…four…" Toddler may not know numbers but they will have an understanding that they need to go faster and faster. Then adult can sit back and say "see how many you can catch before they disappear", and count for toddler.

3. Roller painting. Outside activity.
Lay out a large piece of paper. Have a few different sized balls and a tray of paint. Cover a ball in paint and roll to toddler over paper. Ask her/him to roll back. Use different sized balls. You could also use an old car or truck - dip the wheels in paint and roll along. Makes quite an effective painting. Can be a messy one though - have a bucket of water and detergent and a towel on hand. Old clothes required for toddler.

4. Feet painting. Outside activity.
Another idea taken from ABC's Playschool. Put some paint in a shallow tray. Roll out some butcher paper or place some large pieces of paper in a row. At the other end of the paper have another shallow tray filled with clean water and detergent. Next to this have a towel. Toddler steps into the paint then walks along the paper into the clean water. Ask the toddler to walk side ways, in a zig zag, on their toes for fun and different effects. Toddler can walk over same paper with different coloured paint each time for another effect.