Peake’s visit would be inspirational, he said.
“He’ll be cutting the ribbon and we have a special plaque for him, which will be unveiled as well, at the end,” Scholfield said.
About 50 scouts aged four to 14 from the 5th Haywards Heath Scout Group attended.
Peake said when he was in space batteries, pencils, pens and a pair of scissors all floated past during spacewalks.
On Friday he left his scissors, to open the centre, in his car.
“I’m going to need them,” he said.