Your bike does NOT have an accelerator pump
Many carburetor based motorcycles do NOT come with accelerator pumps. An accelerator pump will squirt fuel into the intake when the throttle is used. Whether the bike is on or off.
Here is a link to the parts assembly for the fuel system of your bike and an image.
Notice that there is not piston to pump fuel as a component of the assembly. You can rule out that your bike was flooded by the grand child.
You may not have spark. Test for spark by taking your spark plug out of the head and putting it on the high tension lead as normal. Make sure the bottom part of the spark plug is grounded on your engine. Turn the bike over as if your were going to start it. Check the plug gap while the bike turns over and validate that you have spark. You will see it. Make sure the gap is shaded, in bright sunlight it may appear you don't have one. If you do, you can rule out the spark plug, coils and wiring that is associated with it.
If you do not have spark and the insulator of the spark plug is black, you may have a rich condition and you have fouled your plugs. You can clean them with carburetor cleaner and an old toothbrush.
Check your choke. If the you happened to ride the bike with choke on you may have fouled your plugs. As well, if it's warm, you may not be able to start the bike due to the choke. Validate the choke setting.
Those are few things for you to investigate. If you discover more information, please post to your question and additional ideas can be derived from the data you have gathered attempting to troubleshoot.
Best of luck.