During the summer you can rent bikes from I'Velo, close to the entrance. Rental costs 5 lei per hour, or 20 lei for a full day. Under-16s and over-65s can rent bikes for free, but for a maximum of two hours.
In the middle of the park is the Sala Polivalenta – a popular venue for concerts, exhibitions and big indoor sporting events - set above a large artificial lake on the shore of which is a great terrace, Cafeneaua Actorilor de Vara, which serves some of the best mici in the city.
Up by Sala Polivalenta you will also find the entrance to Oraselul Copiilor, a large funfair complete with big wheel and other rides, some of which are really rather scary and for over-18s only. Most of the rides cost 5 or 10 lei. It was recently renovated and is a good choice for families with kids.
The best part of Tineretului however is probably the southern side, known as Parcul Vacaresti or Parcul Copiilor, on the corner of B-dul Tineretului and Calea Vacaresti.
Vast amounts of money have been spent on this part of the park, and as such you will find the best and biggest children's playgrounds in the city here. There is also an old steam engine for kids to clamber on, inflatables, a go-kart track, tennis courts, football pitches, volleyball and basketball courts. There are even barbeque spots where you can bring your steaks, sausages and mici and get your grill on.