Gardening DIY

I did lay a patio many years ago. we had lots of old floor tiles from renovating the house. I think I laid them on sand and mortared them in, with a slight slope to where I put a grid. I once rescued a family of small frogs from the grid. 30 or so years later, it is still relatively level but lots of weeds now grow in the cracks. It looks a bit of a mess but I am loathe to do anything about it, it would be a big job to remortar. The alternative would be spraying with weed killer. and it provides me with a lot of interest watching the dunnocks, wrens, bluetits etc searching from tuft to tuft