Joshua Tree National Park Bingo

Find Arch Rock, a natural granite arch on a short loop near the White Tank campground.

The spiky-armed trees thick along Park Boulevard and around Hidden Valley in the west half.

The Joshua tree is not really a tree at all. It is a giant yucca, a relative of the plants in the lily and agave family, with a woody trunk that lets it grow tall like a tree.

Look out over the Wonderland of Rocks, a huge maze of tan granite domes and boulders.

On Pinto Basin Road, find the ocotillo: tall spiny wands that leaf out and flower red after rain.

A deep, croaking call overhead; watch them ride the wind over the rocks and hang around parking lots.

Ravens are some of the smartest birds alive. In tests they can "count" to about seven and solve puzzles, and young ravens do about as well as adult chimpanzees on some thinking tasks.

Walk to Cottonwood Spring, a green oasis of fan palms and cottonwoods in the dry desert.

Watch open flats and roadsides at dawn and dusk, and listen for yipping howls after dark.

A coyote's yip-howl can sound like a whole pack when it's only one or two animals — the sound bounces and doubles.

Take the steep trail up Ryan Mountain for a view over the whole rock-and-Joshua-tree basin.

A lucky-day find on open flats or roadsides in spring mornings, or resting in a burrow.

A desert tortoise can spend most of its life underground. It digs burrows up to several feet long to hide from summer heat and winter cold, and many tortoises may use the same burrow over the years.

Wander Jumbo Rocks, where the campground sits tucked among giant rounded boulders.

On warm summer nights, look on sand and rock after dark, or for a burrow at the base of a shrub.

Under a blacklight (ultraviolet light) the whole scorpion glows a bright blue-green. Chemicals in its hard shell soak up the invisible light and give it back as color, and scientists use blacklights to find scorpions in the dark.

Pick a safe pile of boulders and scramble up. Climbers come from all over for this rock.

Watch a lizard on a warm rock. The males do push-ups to show off their patch of ground.

Walk the loop to the old cattle-ranch reservoir and the Native grinding holes in the rock.

In a good spring, find a Joshua tree topped with a heavy cluster of creamy flowers.

Loop through the rock-walled basin that cattle rustlers once used to hide their herds.

Take the ranger tour of Keys Ranch, a desert homestead left much as the family lived in it.

Photograph the dense cholla garden in low sun. Don't touch, the spiny joints jump onto you.

Photograph the granite turning gold at sunset near Cap Rock or Hidden Valley.

Find the boulder shaped like a skull right off Park Boulevard.

After dark, count more stars than you can see at home in this dark-sky park.

Notice where the tall Joshua trees give out and the low Colorado desert begins.

Look across the Coachella Valley to the San Andreas Fault and the far desert.

Pick up a booklet at a visitor center and finish it to be sworn in as a Junior Ranger.