Recognised developmental milestones may be affected with a pattern of late achievement in skills such as rolling, sitting, standing and walking. Later more complex movements such as running hopping, jumping or kicking and catching a ball may not be at peer level. Movements can be slow and hesitant and are not picked up instinctively, and there may be lack of confidence to tackle new skills. PE and games may be avoided. Balance and stability are often affected and the child may fall or trip over nothing. The control of fine motor skills such as writing and art work are usually more difficult. Conceptual problems can occur such as mastering jigsaws and sorting games when young, and producing graphs, maps and analysing in science and mathematics later on.