The midfielder only managed one competitive appearance in the whole of 2015.
The South African midfielder has been a long-term absentee for the Toffees over the last year, only managing one competitive game in the whole of 2015.
That was down to a series of niggling injuries, with several potential returns having been spoiled by another injury and subsequent absence.
However, he recently made his return against Dagenham and Redbridge in the FA Cup, and has featured three more times since, and says he feels like a kid again now that he has his fitness.
“What can I say? It’s been a nightmare,” Pienaar, 33, told evertontv.
“But I’ve kept going and it was important for me not to lose hope.
At the end of the day, I feel happy now. The last year has been a real learning experience but I feel good.
“I feel like a seven-year-old. Even when I go out on the training pitch, I’m just happy that I have made it so far after a year of so many different injuries. I am enjoying every day of it.”
The midfielder will now be hoping to add something to an Everton side whose season is in danger of spiralling out of control.
After the recent loss to Swansea City at Goodison Park they are now 12th in the league, a position far below where a side of their quality should be challenging.
That has caused serious unhappiness from the Blues faithful, and Pienaar will be hoping he can help to turn things around in the second half of the campaign.