Have an adult cut the baguette into 1/2 inch slices.
Put the "rounds" of bread on a cookie sheet. Lightly brush each round with olive oil on both sides.
Put the cookie sheet into the oven for 2 to 5 minutes until the bread is slightly browned at the edges. Watch it closely because the bread can go from toasted to burned very quickly.
While you're waiting, put hot pads down on your work surface.
When the toasts are ready, take the cookie sheet out of the oven and put it on the hot pads.
Mix the tomatoes, parsley, onion, salt and pepper in a bowl. Put a couple spoonfuls of the tomato mixture on the toasts.