things to do with a 19 month tb?

Just do as you're doing. Handle him often, do short learning sessions. You may want to teach him to ground drive. Its great exercise for both of you and its a great way to prepare him for the future. Keep your work sessions short, he is a youngster so you don't want to burn him out or over stimulate him.

At this age one of my favorite things to do is lead and tie them everywhere I go while I do my chores. Its a good way to desensitize them while still doing your everyday things like dumping buckets, refilling the feed bin, setting up barrels or jumps in the arena, etc. I like to do this because when desensitizing, I don't want to be just coming at the horse all the time with scary objects. I just want him to not react when he sees one. By simply rolling up the hose with him on lead or tied near by, he is exposed to the monster, the monster doesn't harm him, he has no reason to fear the monster. Taking myself out of the equation by remaining neutral (not coming at him nor saving him), he has to depend on himself to survive the monster building his self confidence, making him less skittish to new things. That also builds his trust in me. By remaining neutral and him surviving it shows him I knew there was nothing to worry about. When he encounters a new scary object he will look to my reaction before responding accordingly because my discretion has kept him safe thus far.

Practice tying, spraying him with spray bottles and water horses, expose him to clippers, blankets, scrapers, towels, leg wraps, vehicles. Line drive him all over, teach him voice commands. There is a lot you can do with a horse on the ground.

if you are board, sell him and buy a horse older! it saves the money if you can't do anything wiht him :)