In The Garden: need id for 2 plants

hi
can anyone help id these two plants?

the first photo with the small flowers is my neighbour's she says bees absolutely love it and there are always lots of bees on the plant

the second is a tree in my front yard, looks like some sort of ornamental plum, branches are incredibly heavy from all the fruit, I wish they could be used for something, any ideas?

thanks

 

The first one is Spirea sp.

 

Not plum, more like a crab apple.

 

we should be able to juice them for jelly I would think, any ideas if this plant would be edible for that purpose?

 

Is Crab Apple Tree Fruit Dangerous?