  In bilayer graphene, electrostatic confinement can be realized by a suitable
design of top and back gate electrodes. We measure electronic transport through
a bilayer graphene quantum dot, which is laterally confined by gapped regions
and connected to the leads via p-n junctions. Single electron and hole
occupancy is realized and charge carriers $n = 1, 2,\dots 50$ can be filled
successively into the quantum system with charging energies exceeding $10 \
\mathrm{meV}$. For the lowest quantum states, we can clearly observe valley and
Zeeman splittings with a spin g-factor of $g_{s}\approx 2$. In the low
field-limit, the valley splitting depends linearly on the perpendicular
magnetic field and is in qualitative agreement with calculations.
