There is no limit to the objects you can choose. The scope is inexhaustible. It is only limited by your imagination. To help you, we will give the following suggested list. They are only our suggestions and it is not necessary to restrict yourself to them. Create any objects that you wish from your own mind.
Living things: a swooping bird, a graceful cat, a thoughtful elephant, an alert deer, an agile monkey, a peaceful contented cow, a sly fox, a fluttering butterfly, a proud peacock, a gliding fish, a basking crocodile, a beautiful lotus, a blood red rose, a large yellow sunflower, a blade of grass swaying in the breeze, a shady oak tree, a leaf dampened with dew and many other objects.
Deities and famous people: your guru, any great saint, Christ, Buddha, Mohammed, Rama, Krishna, Durga, Kali, Ganesha, Shiva and other deities.
Objects of nature: the sun, the moon, any of the signs of the zodiac, any precious stone such as diamond, onyx, sapphire, topaz, ruby, cat’s eye, pearl and so forth, a towering mountain, a floating cloud, an oasis, rolling hills, green valleys, a sandy beach, rugged cliffs, a quiet forest and so on.
Buildings: a temple, a church, a mosque, the pyramids of Egypt, an ashram or monastery, a pagoda in a beautiful sculptured garden, a stupa, old ruins, a shrine or any holy place, a hermitage in the forest, etc.
Traditional symbols: a yin yang sign, a cross, a shivalingam, shaligram, the eternal flame, menorah, the chalice, a prayer wheel, an Aum symbol, a trident and any other symbol that you can think of.