You may see your infant avoiding eye contact or being extra stand offish to others. These children have trouble playing with others and choose to play alone. They may not play with toys in a coordinated way. Instead they may chose to spin wheels on cars instead of running them on the wheels on the ground. They may line toys up or groups toys together, but not seem to understand how to actually play with a toy. They may be very particular about certain things. How toys are placed, how food is on a plate, only eating white foods or certain taste profiles. They may bump into walls a lot and not seem to understand how their body works in space. You may see excessive fears of some activities, places, people or animals. These children often have difficulty self soothing and often seem to go from 0-100 shades of pissed over things that seem insignificant. They may reject textures of clothing, have obsessions with non toys or carry only one particular toy around. Again there is no actual playing with these toys. They may seem overly anxious and are unable to transition between activities. They can adhere to very religious routines even at this age and be very upset if that routine is disrupted even the tiniest bit.