Not sure why a regular or short cycle won't work just as well for soft toys, etc. but building blocks? When my son was young, I used a tight-mesh laundry bag and put them in the dishwasher, flipping the bag over mid-way through the cycle. Spread on a towel to dry.
I use the short cycle on the SQ f/l for dog toys, etc. now and then. He's always perplexed when they return, smelling absolutely foul (to him) but is quickly won over by the irresistible joy of playtime.